STU
26 models recorded, with the line-output transformer or tripler each was fitted with.
| Model | Parts |
|---|---|
| 1422 | HR 8915 |
| CHASIS 3 S 10 | HR 8915 |
| CHASIS 5 N 10 | HR 7424 |
| CHASIS 5 N 11 | HR 7424 |
| CHASIS 5 P 60 | HR 80287 |
| CHASIS M 13 | HR 80490 HR 8937 |
| CHASIS M 17 | HR 80917 HR 8452 |
| CHASIS M 28 | HR 80490 HR 8915 |
| ST 1401 | HR 80490 HR 8915 |
| ST 1402 | HR 80490 HR 8915 |
| ST 1404 | HR 80917 |
| ST 1418 | HR 80917 |
| ST 1422 | HR 8915 |
| ST 2101 | HR 8452 |
| ST 2104 | HR 81747 |
| ST 2132 SF | HR 8937 |
| ST 2139 A | HR 80490 |
| ST 2199 | HR 8915 |
| ST 25 NF 1 | HR 8937 |
| ST 2539 A | HR 8937 |
| ST 29 F 1 | HR 7424 |
| ST 29 SF 1 | HR 80287 |
| ST 2902 | HR 8937 |
| ST 2939 A | HR 7424 HR 8937 |
| STV 9302 | HR 80490 |
| TV 1401 | HR 80917 |